Online PHP editor | output for 5IlGE

@ 2014-06-09T08:16:26Z

<?php  
//whether ip is from share internet  
if (empty($_SERVER['HTTP_CLIENT_IP']))     
  {  
    $ip_address = $_SERVER['HTTP_CLIENT_IP'];  
  }  
//whether ip is from proxy  
elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR']))    
  {  
    $ip_address = $_SERVER['HTTP_X_FORWARDED_FOR'];  
  }  
//whether ip is from remote address  
else  
  {  
    $ip_address = $_SERVER['REMOTE_ADDR'];  
  }  
echo $ip_address;  
?>

Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6: Warning: Undefined array key "HTTP_CLIENT_IP" in /in/5IlGE on line 5
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33: Notice: Undefined index: HTTP_CLIENT_IP in /in/5IlGE on line 5
Output for 7.3.32 - 7.3.33
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17: Notice: Undefined index: HTTP_CLIENT_IP in /in/5IlGE on line 5

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